Titre du document / Document title
Mode dependent scattering of phonons by domain walls in ferroelectric KDP
Auteur(s) / Author(s)
WEILERT M. A. ;
MSALL M. E. ;
WOLFE J. P. ;
ANDERSON A. C. ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
Univ. Illinois at Urbana-Champaign, physics dep., Urbana IL 61801, ETATS-UNIS
Résumé / Abstract
Thermal conductivity and ballistic phonon imaging measurements in KH
2PO
4 (KDP) at low temperature (T < 3K) indicate that scattering from domain walls has a large effect on phonon transport. kDP has a ferroelectric phase transition from tetragonal to orthorhombic structure at T
c = 122 K. Below T
c domains of opposite electric polarization and crystal orientation form unless the sample is colled in an electric field. Thermal conductivity measured along the [100] (tetragonal) axis drops 30% when domain walls are present, which is independent of sample size and temperature. We attribute this decrease to phonon polarization-dependent scattering at the domain boundaries
Revue / Journal Title
Zeitschrift für Physik. B, Condensed matter
ISSN
0722-3277
CODEN ZPCMDN
Source / Source
1993, vol. 91, n
o2, pp. 179-188 (13 ref.)
Langue / Language
Anglais
Editeur / Publisher
Springer, Berlin, ALLEMAGNE
(1980-1997)
(Revue)
Mots-clés anglais / English Keywords
;
;
;
;
;
;
;
;
;
;
;
Mots-clés français / French Keywords
;
;
;
;
;
;
;
;
;
;
;
Mots-clés espagnols / Spanish Keywords
;
;
;
;
;
;
;
;
;
;
;
Localisation / Location
INIST-CNRS, Cote INIST : 799 B, 35400003371573.0090
Nº notice refdoc (ud4) : 4739187
